diff options
| author | Niels Provos <provos@cvs.openbsd.org> | 2001-07-17 22:22:18 +0000 |
|---|---|---|
| committer | Niels Provos <provos@cvs.openbsd.org> | 2001-07-17 22:22:18 +0000 |
| commit | e7979e30e8ae4854f6b6e26eee9c7c526d0e0a37 (patch) | |
| tree | 1983c2869aa59493165fc5d4689b358a897f75b8 /sys/net | |
| parent | 49ee2307a2fd26e9b44b815990e007ea64e7faa7 (diff) | |
support min-ttl, okay dhartmei@
Diffstat (limited to 'sys/net')
| -rw-r--r-- | sys/net/pf_norm.c | 5 | ||||
| -rw-r--r-- | sys/net/pfvar.h | 3 |
2 files changed, 6 insertions, 2 deletions
diff --git a/sys/net/pf_norm.c b/sys/net/pf_norm.c index c67836e5bfa..b9759a0e9d9 100644 --- a/sys/net/pf_norm.c +++ b/sys/net/pf_norm.c @@ -1,4 +1,4 @@ -/* $OpenBSD: pf_norm.c,v 1.2 2001/07/17 21:54:26 provos Exp $ */ +/* $OpenBSD: pf_norm.c,v 1.3 2001/07/17 22:22:14 provos Exp $ */ /* * Copyright 2001 Niels Provos <provos@citi.umich.edu> @@ -516,6 +516,9 @@ pf_normalize_ip(struct mbuf **m0, int dir, struct ifnet *ifp, u_short *reason) else h->ip_off &= IP_DF; + /* Enforce a minimum ttl, may cause endless packet loops */ + if (r->min_ttl && h->ip_ttl < r->min_ttl) + h->ip_ttl = r->min_ttl; return (PF_PASS); diff --git a/sys/net/pfvar.h b/sys/net/pfvar.h index c92d2731e5f..38201247d77 100644 --- a/sys/net/pfvar.h +++ b/sys/net/pfvar.h @@ -1,4 +1,4 @@ -/* $OpenBSD: pfvar.h,v 1.34 2001/07/17 21:54:26 provos Exp $ */ +/* $OpenBSD: pfvar.h,v 1.35 2001/07/17 22:22:15 provos Exp $ */ /* * Copyright (c) 2001, Daniel Hartmeier @@ -73,6 +73,7 @@ struct pf_rule { u_int8_t flagset; u_int8_t rule_flag; + u_int8_t min_ttl; /* minimum ttl for packet normalize */ }; #define PFRULE_RETURNRST 0x01 |